MC13282A View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC13282A Datasheet PDF : 12 Pages
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MC13282A
pulse generated from the flyback or from an MCU. The
threshold level of 1.25 V. The blanking pulse width should be
equal to the flyback retrace period to make sure that the
video signal is blanked properly during retrace. It is
necessary to limit the amplitude, and avoid any negative
undershoots if the flyback pulse is used. This Blanking input
pin cannot accept a negative voltage. This pin should be
grounded if it is not used.
OSD interface
Figure 3 show a typical application with an OSD device
(MC141540). The MC141540 OSD and FC outputs are TTL
compatible, and therefore interface directly with MC13282A.
Level shifting circuitry is not needed. The MC141540 is a
digital device, controlled by an MCU. Therefore, separate
power supply runs to the MC141540 and to the MC13282A
are recommended. Care should be taken in the PC board
layout to prevent digital noise from entering the analog
portions of MC13282A.
Normally the OSD switching is done during the active
video time. It is recommended that the Fast Commutate pin
not be activated during the horizontal sync time.
Figure 3. Interfacing with OSD Device
5.0 V
8.0 V
VR1 VR2 VR3
50 k 50 k 50 k
C11 C12 R4
10 µF 47 µF 10
C10 C9
0.1 0.1
C7
C8
47 µF
0.1
R Input
G Input
B Input
C1 0.1
C2 0.1
C3 0.1
R1 R2 R3
75 75 75
R
G
B
V5 Gnd VCC Video
Contrast Contrast Contrast
VCC
R Input
G Input
R Emitter
G Emitter
B Input
MC13282A
Video Processor
with OSD Interface
B Emitter
R Clamp
Clamp
G Clamp
Blank
Fast
OSD
ROSDGOSD BOSD Commutate Contrast
B Clamp
Contrast C4
0.1
R5
330
R6
RGB Output
330
R7
330
C5
C6
0.1 0.1
Clamp Blank
Input Input
5.0 V
5.0 V
VR4
VR5
50 k
50 k
5.0 V
MCU Interface
ROSD GOSD BOSD Fast H Tone
Commutate
VDD
SS
MOSI
SCK
MC141540
On Screen Display
Processor
HF/B VF/B
VCO
VSS
VDDA
VSSA
RP
C18
10 µF
C17
0.1
5.0 V
L1
150 mH
C16
C15
100 µF 0.1
VDDA
R8
470 k
R9
5.6 k
R10
2.0 k
R11
7.5 k
Hsyn Vsyn
Input Input
C13 C14
0.01
0.1
8
MOTOROLA ANALOG IC DEVICE DATA
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